add a note about unity auto upload (#4852)

Co-authored-by: Isabel <[email protected]>

Author: bruno-garcia

src/platforms/common/data-management/debug-files/upload/index.mdx

@@ -4,6 +4,15 @@ sidebar_order: 3
 description: "Learn about uploading debug information files to Sentry."
 ---
 
+<PlatformSection supported={["unity"]}>
+<Note>
+
+The Sentry SDK for Unity automatically uploads debug files at build time. That means you don't need to use `sentry-cli` directly.
+You can find more information about this in the [Unity native support documentation](/platforms/unity/native-support/).
+
+</Note>
+</PlatformSection>
+
 The most straightforward way to provide Sentry with debug information file is
 to upload them using `sentry-cli`. Depending on your workflow, you may want to
 upload as part of your build pipeline or when deploying and publishing your